ale1910
09.10.2019 •
Mathematics
Does the order in which you perform an operation matter? give examples to support your explanation.
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Ответ:
yes
Step-by-step explanation:
You work by PEMDAS
(Parenthesis exponents multiply divide add and subtract)
Example:
5 • 3 + 6 ÷ 3
using PEMDAS you get
15+2= 17
not using PEMDAS
15+6÷3
21÷3
7
two different answers
so therefore important to use the order of operations
Ответ:
x+y = 100 |*(-20) => -20x -20y = -2000
4.50x+20y=822.00 (+) =>
=> -15.50x = - 1178.00 => x = 1178.00/15.50 = 76 => y = 100 -76 => y = 24.